Voltamp Controls [India] Pvt Ltd manufactures Single Phase Enclosed Type Auto Transformer. Voltamp Controls [India] Pvt Ltd also manufactures various types of continuously variable auto transformers, servo controlled voltage stabilizers, constant voltage transformers, rectifiers for electroplating / anodizing and hydrogenation, AC synchronous motors, current transformers, potential transformers, relay type voltage stabilizers and low voltage transformers etc. The Single Phase Enclosed Type Auto Transformer, under the brand name Varivolt, is a continuously variable voltage auto transformer, having a movable carbon tip, fixed to brush arm sliding on a silver plated commutator. The Single Phase Enclosed Type Auto Transformer has rotation of the brush arm by either manual or motor drive. This Auto Transformer delivers an output voltage from zero or above line voltage. This Auto Transformer is floor or table mounted.